Well, let's see here....
Hubby and I each have Suzuki Folk Master diatonics in A, Bb, D, and F.
Hubby has a Lee Oscar in C Major, and C Minor (Eb Major), as well as a Seydel Blues Session in LLF, and a Seydel Solist Pro in Bb Minor (Db Major).
I have a Suzuki Pro Master in C, a Seydel Blues Session in C, G, Low G, Low D, and Low Eb. I also have Seydel Solist Pro(s) in Bb, G, D, Eb, and F.
And last, but by no means least, I have a Seydel DeLux Chromatic in C (my very first Chromatic), a Hohner 64 Chromonica 280 in C, and a Suzuki Chromatix SCX-64 also in C. Both the Hohner and Suzuki chromatics have had their reeds gapped, tuned, octave tuned, and generally gone over with a fine tooth comb by Steve Malerby, aka "harpsurgeon".
My next purchase will be a Suzuki SCX-48 in G, and maybe another SCX-48 in C (no doubt I'll get other keys, too...). Eventually I'd like to get a Suzuki SDB-39 (preferred), or a SDB-29. Both are Double Bass harmonicas, but the SDB-39 has a greater range, and so I have my eyes on it.
Geordie, your friend has given you a great gift. If he could make it sing, it no doubt brought great joy to him in his lifetime. He was trying to pass on that gift, that joy, to you by giving you his chromatic. It may take several years before you decide to try and play it, but don't give up on it. Reading music isn't all that difficult. It's mostly just memory work. Keep at it. You'll get it.
Glad you've found that same happiness that most of us have found in this incredible little instrument.
Your harp collection is just beginning.